reckoned a capital vice, rather than a daughter of
vainglory.

On the contrary stands the authority of Gregory (Moral. xxxi, 45).

_I answer that,_ Discord denotes a certain disunion of wills, in so
far, to wit, as one man's will holds fast to one thing, while the
other man's will holds fast to something else. Now if a man's will
holds fast to its own ground, this is due to the act that he prefers
what is his own to that which belongs to others, and if he do this
inordinately, it is due to pride and vainglory. Therefore discord,
whereby a man holds to his own way of thinking, and departs from that
of others, is reckoned to be a daughter of vainglory.

Reply Obj. 1: Strife is not the same as discord, for strife consists
in external deeds, wherefore it is becoming that it should arise from
anger, which incites the mind to hurt one's neighbor; whereas discord
consists in a divergence in the movements of wills, which arises from
pride or vainglory, for the reason given above.

Reply Obj. 2: In discord we may consider that which is the term
_wherefrom,_ i.e. another's will from which we recede, and in this
respect it arises from envy; and again we may consider that which is
the term _whither,_ i.e. something of our own to which we cling, and
in this respect it is caused by vainglory. And since in every moment
the term _whither_ is more important than the term _wherefrom_
(because the end is of more account than the beginning), discord is
accounted a daughter of vainglory rather than of envy, though it may
arise from both for different reasons, as stated.

Reply Obj. 3: The reason why concord makes small things thrive, while
discord brings the greatest to ruin, is because "the more united a
force is, the stronger it is, while the more disunited it is the
weaker it becomes" (De Causis xvii). Hence it is evident that this is
part of the proper effect of discord which is a disunion of wills,
and in no way indicates that other vices arise from discord, as
though it were a capital vice.
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QUESTION 38

OF CONTENTION
(In Two Articles)

We must now consider contention, in respect of which there are two
points of inquiry:

(1) Whether contention is a mortal sin?

(2) Whether it is a daughter of vainglory?
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FIRST ARTICLE [II-II, Q. 38, Art. 1]

Whether Contention Is a Mortal Sin?

Objection 1: It would seem that contention is not a mortal sin. For
there is no mortal sin